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What are the two radii shown as'a' and '...

What are the two radii shown as'a' and 'b' in the figure known as?

A

a=atomic radius,b=molecular radius

B

a=Covalent radius,b=van der waals' radius

C

a=Ionic radius,b=Covalent radius

D

a=Covalent radius,b=Atomic radius

Text Solution

Verified by Experts

The correct Answer is:
B
a'Represents covalent radius which is the distance between the nuclei of two bonded atoms 'b' represents van der waals'radius which is the distance between nuclei of two closest molecules.
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NCERT FINGERTIPS-CLASSIFICATION OF ELEMENTS AND PERIODICITY -Periodic Trends In Properties Of Elements
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  2. Few values are given in the table in the direction from left to right ...

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  3. Which of the following statements regarding the variation of atomic ra...

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  4. Ionic radius a group while moving down

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  5. K^(+) and Cl^(-) ions are isoelectronic.Which of the statement is not ...

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  6. Which one of the following groups represent a collection of isolectron...

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  7. Which of the following transitions involves maximum amount of energy?

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  8. What is the order of successive ionisation enthalpies?

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  9. Which group of elements shows lowest ionisation enthalpy?

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  10. The first ionisation enthalpy of the elements C,N,P,Si are in the orde...

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  11. The ionisation energy of nitrogen is more than that of oxygen because

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  12. which of the following elements has the highest value of second ioniza...

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  13. Which of the following can most easily form unipositive gaseous ion?

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  14. Amongst the metal Be, Mg, Ca and Sr of group 2 of the periodic table, ...

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  15. Beryllium has higher ionisation enthalpy than boron.This can be explai...

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  16. A sudden large jump between the values of second and third ionisation ...

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  17. Few elements are matched with their successive ionisation energies,Ide...

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  18. First and second ionisation enthalpies(in KJ/mol) of few elements are ...

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  19. Ionization enthalpies of transition metals are

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  20. Consider these electronic configurations for neutral atoms: (i) 1s^(...

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